My reverse light are always on

My 05 chevy 1500 has a flatbed on it and was done on amature hour. The rear end wiring wasnt working so I decided to run new wiring from the fuse box using a fuse tap all the lights work but the problem is my reverse lights are always on. My question is does the switch for the reverse lights that i assum is either on the shifter or transmission lie between the battery and fuse box or the fusebox and the lights. If it's the latter then obviously I bypassed the switch but none of the other lights are like that so I don't see that being the case